Music and musings

Chasm

There are dozens of jazz heads based on the chord changes to Gershwin’s “I Got Rhythm”, which makes it probably the most popular standard template after the 12-bar blues. Unlike the blues, though, almost every version of “rhythm changes” is in the same key. Usually the difference in these tunes lies in the B section, as can be seen in this Cannonball Adderley composition, where he replaces the usual D7 / G7 / C7 / F7 with a Bb7 / Ab7 / Gb7 / F7 progression (with attendant subdominants).